.checkbox{
    width: 50px;
    height: 25px;
    margin: 0 auto;
    position: relative;
}

.checkbox:before{
    content: '';
    background-color: #1d4741;
    width: 100%;
    height: 7px;
    border-radius: 10px;
    transform: translateY(-50%);
    position: absolute;
    top: 50%;
    left: 0;
    transition: all 0.3s ease 0s;
}

.checkbox input[type=checkbox]{
    margin: 0;
    visibility: hidden;
    left: 7px;
    top: 7px;
}

.checkbox label{
    background-color: #1d4741;
    height: 25px;
    width: 25px;
    border-radius: 50%;
    cursor: pointer;
    position: absolute;
    top: 0;
    left: 0;
    transition: all .3s ease;
    animation: pulsein .3s;
}

.checkbox input[type=checkbox]:checked+label{
    background-color: #10C298;
    transform: translateX(25px);
    animation: pulseout 0.3s;
}

@keyframes pulsein{
    0%,100%{
        height: 25px;
        width: 25px;
        top: 0px;
    }
    50%{
        height: 19px;
        width: 35px;
        top: 3px;
    }
}

@keyframes pulseout{
    0%, 100%{
        height: 25px;
        width: 25px;
        top: 0px;
    }
    50%{
        height: 19px;
        width: 35px;
        top: 3px;
    }
}

@media only screen and (max-width:767px){
    .checkbox{ margin: 0 0 20px; }
}